And how! It's not just Arma 3 that will be influenced by this. Developers and publishers everywhere will be reconsidering the merits of allowing modding and by extension, doing a decent PC version. Day Z isn't going to rewrite the gaming word but it's a nice boost.

I'm thinking it's more likely we will see a fucking ton of Day Z copycat games in the years to come.

That's not necessarily a bad thing. DayZ is great but extremely rough. If another developer released a more polished and expanded version of the mod, I'd probably buy it.